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CVE-2026-89842 Linux CVE debrief

A Linux kernel vulnerability allows skipping NVMe LS reject IOCB when firmware is not started, potentially causing issues with qla2xxx SCSI driver functionality. This vulnerability affects Linux kernel versions and requires verification of Linux kernel versions and application of patches to prevent potential issues with qla2xxx SCSI driver functionality. The vulnerability is related to the qla2xxx SCSI driver and skipping NVMe LS reject IOCB when firmware is not started, which may cause issues with Linux kernel versions.

Vendor
Linux
Product
Unknown
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-16
Original CVE updated
2026-10-19
Advisory published
2026-09-16
Advisory updated
2026-10-19

Who should care

Linux administrators and users who rely on qla2xxx SCSI driver functionality should verify Linux kernel versions and apply patches to prevent potential issues. Linux kernel administrators, qla2xxx SCSI driver users, and security teams should review the vulnerability details and apply patches to ensure qla2xxx SCSI driver functionality.

Why it matters

Linux kernel vulnerability CVE-2026-89842 requires verification of Linux kernel versions and application of patches to prevent potential issues with qla2xxx SCSI driver functionality.

  • Verify Linux kernel versions to prevent potential issues
  • Apply patches to ensure qla2xxx SCSI driver functionality
  • Monitor system logs for potential issues

Technical summary

The Linux kernel vulnerability CVE-2026-89842 is related to the qla2xxx SCSI driver and skipping NVMe LS reject IOCB when firmware is not started. This vulnerability affects Linux kernel versions and requires verification of Linux kernel versions and application of patches to prevent potential issues with qla2xxx SCSI driver functionality. The vulnerability is caused by the qla_nvme_xmt_ls_rsp() function bailing out to the out: label when firmware is not started, but the out: path unconditionally calls qla_nvme_ls_reject_iocb().

Defensive priority

Verify Linux kernel versions and apply patches to prevent potential issues with qla2xxx SCSI driver functionality.

Recommended defensive actions

  • Verify Linux kernel versions and apply patches
  • Review qla2xxx SCSI driver functionality
  • Monitor system logs for potential issues
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the Linux kernel vulnerability, but do not specify versions, exploitation, or impact. Further verification is required to determine the affected scope, severity, and vendor guidance. The vulnerability requires verification of Linux kernel versions and application of patches to prevent potential issues. The source grounding and evidence limits are not explicitly stated, and defenders should verify the vulnerability details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-89842 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-89842

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-89842 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-89842

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • scsi: qla2xxx: Skip NVMe LS reject IOCB when FW not started

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/89xxx/CVE-2026-89842.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/2935b730211c5c1433aa6101fa3b55df2b63869a

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/7c1fc75dd3fb6b6414508fbdf7aeed0d757c9120

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/ac4b019ac07844d3f67ea5e48b1d982b2170d1a7

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/e9bfb56e2c1bda49d3c5442d824569d71eec07e2

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/f7e46ebffc5781aab3f1f5a5d4350addbb5833f4

    Supplemental source

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.